Keep the BLUE outfit?
The classic NG outfit will be unlocked once you beat the game on one of the difficulties.

However the purple outfit, no.
That's the only place and time Ryu wears that.

I don't mind they adding clothing with tiny pieces of armor as well, like shoulder pad, small and slick.
Like the guy in Last Remnant or Cloud Strife. But outfits like that isn't Ryu's style or else we would have seen one by now.